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A Method for Predicting the Surface Roughness of Work Rolls in Double-Stand Wet Skin Skinning Unit

A technology of surface roughness and work roll, applied in the field of cold-rolled steel sheet wet pass rolling, can solve the problem that the surface roughness cannot be accurately predicted online, and achieve the effect of maximizing the use benefit, high forecasting accuracy, and ensuring the surface roughness.

Active Publication Date: 2019-04-19
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for predicting the surface roughness of the working rolls of a double-frame wet-leveling unit, which mainly solves the technical problem that the existing double-frame wet-leveling unit cannot accurately predict the surface roughness of the working rolls online, and realizes double-frame Refined maintenance of the work rolls of the wet leveling unit, reducing the cost of wet leveling of cold-rolled steel plates, and ensuring the surface roughness of the steel plates

Method used

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  • A Method for Predicting the Surface Roughness of Work Rolls in Double-Stand Wet Skin Skinning Unit
  • A Method for Predicting the Surface Roughness of Work Rolls in Double-Stand Wet Skin Skinning Unit
  • A Method for Predicting the Surface Roughness of Work Rolls in Double-Stand Wet Skin Skinning Unit

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Embodiment Construction

[0041] refer to figure 1 and figure 2 , a method for predicting the surface roughness of work rolls in a double-stand wet skin pass unit, comprising the following steps:

[0042] (a) The prediction model of the surface roughness of the working rolls of the double-stand wet skinning unit for different steel production processes by the computer group;

[0043] (a1) Parameter collection, collect the original surface roughness Ra of the work roll r0,i ={1.63μm, 1.63μm, 1.63μm, 1.63μm}, rolling pressure p i ={6978kN, 6987kN, 6955kN, 3196kN}, surface hardness difference K between strip steel and work roll d,i = {35HS, 42HS, 35HS, 52HS}, thickness of non-extruded fluidized layer ξ i ={0.06μm, 0.06μm, 0.06μm, 0.06μm}, rolling kilometers L i,j ={5.1km, 10.2km, 14.9km, 20.1km, 24.9km; 4.9km, 9.9km, 14.8km, 20.7km, 25.4km; 4.8km, 10.6km, 15.6km, 21.1km, 25.3km; 4.8km, 10km, 15.1km, 20.1km, 24.7km}, measured work roll surface roughness Ra′ under different rolling kilometers ri,j =...

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Abstract

The invention relates to a predicting method for surface roughness of a double-rack wet flattening unit work roller, and the technical problem that the surface roughness of an existing double-rack wetflattening unit work roller cannot be accurately predicted online is mainly solved. The method comprises the steps that a, a double-rack wet flattening unit work roller surface roughness prediction model of a unit for different steel grade production technologies is calculated; b, the lower limiting value Ra<r, min> of the surface roughness of the work roller within the rolling period is given; c, the steel roll parameter n is given and initialized, and n is equal to 1; d, the parameters of rolling of the nth-roll strip steel within the work roller rolling period are collected; e, the original surface roughness Ra<r, p+1> of the work roller during (n+1)th-roll strip steel production is predicted; f, whether Ra<r, p+1> is smaller than or equal to Ra<r, min> or not is judged, if not, p=p+1,Ra<r0>=Ra<r,p+1>, the step c is conducted, and if yes, p =p-1, and the step g is conducted; and g, p is output, it is shown that shutdown needs to be conducted for roller replacement after producingof the pth-roll strip steel, prediction of the work roller surface roughness is ended, and the next roller replacement cycle is conducted.

Description

technical field [0001] The invention relates to work rolls of a double-stand wet skinning unit, in particular to a method for predicting the surface roughness of a work roll of a double-stand wet skinning unit, and to the technical field of cold-rolled steel plate wet skinning rolling. Background technique [0002] Surface roughness is one of the important characteristics of flat finished cold-rolled steel sheets. It not only affects the deformation behavior of cold-rolled steel sheets during stamping and the appearance after coating, but also can change the corrosion resistance of materials. In the production of high value-added products such as automobile sheets, home appliance sheets, wheels and gas cylinder steels, the requirements for the surface quality of strip steel are very strict, so the research on surface quality has attracted more and more attention. For the wet temper rolling process, the surface roughness of the strip mainly depends on the surface roughness of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B38/00G06F17/50
Inventor 魏宝民王天顺穆海玲
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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